Even though start_date can be optional in the payload, it will always be
present in the form.

Introduced to make editing of templates possible using the admin
interface. There are currently two types of templates, and there can
only be one instance of each type so that the system knows which
template to use in which situation.

Resolves: GREG-73

Fixing bug where details button was not shown

See merge request !131

GREG-100: Cancel invitation

See merge request !129

GREG-91: Expand sponsor api

See merge request !126

Greg 61 role button

See merge request !124

Fix script for populating db with test data

See merge request !127

Code for guest routes moved to their own folder so that we don't need
multiple api calls.
Serializer class for roles has been simplified with methods for
validation of each field and a separate one used in invites without
requiring the person field.

Resolves: GREG-61

Greg 96 fix build

See merge request !125

Breaks npm build

Issue: GREG-96

Issue: GREG-96

Bump deps

See merge request !122

Adding section on sponsorpage

See merge request !119

Greg 61 Add search field

See merge request !120

Allows search using e-mail and mobile phone, limiting results to 10
first matches